Field



(No Model?) 7 F. R. BUTTERFIELD.

I BUNG. No. 567 563. "Patented SeptJS, 1896.

ATENT FFICE.

FINLEY R. BUTTERFIELD, OF

CONCORD, NEl/V HAMPSHIRE.

BUNG.

SIPECIFICATION forming part of Letters Patent No. 567,563, datedSeptember 8, 1896..

Application filed April 24, 1896.

To all whom it may concern.-

Be it known that I, FINLEY R. BUTTER- FIELD, a citizen of the UnitedStates, residing at Concord, in the county of Merrim ao and State of NewHampshire, have invented certain new and useful Improvements in Bungs;and I do hereby declare the following to be'a full, clear, and exactdescription of the invention, such. as will enable others skilled in theart to which it appertains to make and use the same.

My invention relates to bungs which may be readily removed without thenecessity of pounding the staves, which results in more or less injuryto the barrel.

The objects of the invention are to provide a bung which may be easilyset or removed and one which when used in a barrel containingeffervescing liquids will become more tightly sealed from the pressurefrom within the barrel, and one which will require but little labor infinishing and will be economical of construction.

The inventionconsists in the various novel features of construction, asfully set forth in the following specification and claims, and clearlyillustrated in the drawings accompanying and forming a part of the same,of which Figure 1 is a vertical section of my improved bung complete,Fig. 2 being a detailed plan view of the bung-lining. Fig. 3 is across-section of the same. Fig. i is a detailed broken elevation of thebung. Fig. 5 is a plan view of the bung.

Corresponding letters designate like parts in all the views.

A represents the metal bung-lining, which is made a little tapering, asshown, and provided with an external thread a for turning into abung-hole, and with an external annular flange at its top. The interiorof said lining A is bowl-shaped, as shown at a, and the opening at itsbottom is so rounded as to make it slightly larger in diameter at itsextreme lower edge, as seen at a This form of bottom opening is a veryimportant feature in my invention, as will be pointed out in thisspecification. Slightly below the top of the bung-lining A is providedan internal flange (L in which is formed the slots a and the undersurface of said flange is spirally in- Serial No. 588,879. (No model.)

clined on opposite sides between said slots, as

. seen in Fig. 3.

flange, and at the proper point below .the

flange b of the bung are formed 011 opposite sides the projections 12,which drop through said slots of and engage the lower'spirally-inclinedsurfaces of the flange a when the bung is rotated by reason of thegasket C, secured by the screw 0 to the bottom of the bung, which gasketis bowl-shaped and bears hard against the interior bowl-shaped portionof the lining, as seen in Fig. 1, and by reason of the peculiar roundedsurface of the bottom opening in said lining the edge of the gasket hasa tendency to spread by the internal pressure of the gas from anyeffervescing liquid in the barrel, which greatly increases the sealingefficiency of the bung The gasket or plug Chas at its top a circularprojection, which fits into the groove 5 formed in the bottom of thebung B, and thus the gasket is kept in a position concentric with saidbung.

The bung is provided with a socket in its top in which to fit a wrenchor key for turning the same, as seen at 6 Figs. 1, 4, and 5.

Having thus described my invention, what I claim is- 1. A bung-holelining having at its top an external flange and slightly belowits top aninternally projectin g flange the under surface of which is spirallyinclined on opposite sides and slots formed in the thinnest portion ofsaid flange, and a bowl-shaped bottom opening and a bung provided withprojections for engaging the under side of said internal flange andadapted to seat itself in and close the bottom opening of said lining,and an annular flange'at its top to exclude dirt.

2. A bung-hole lining provided with an internally-projecting flangelocated nearits top, the under surface of said flange being spirallyinclined on opposite sides, slots arranged diametrically oppositethrough the thinnest 'portion of said flange, the interior of saidlining being bowl-shaped and provided with a bottom opening having itsedge rounded, and a bung provided with projections for engaging theunder side of said flange, and a bowlshaped rubber gasket secured to thebottom of said bung, all substantially for the purpose set forth.

A bung-lining being internally bowlshaped and externally threaded andprovided With an external flange at its top an internally-projectingflange near its top provided With slots at opposite sides the undersurface of said flange being spirally inclined between said slots, and abun g having an annular flange at its top and projections on oppositesides and below said flange adapted to enter the slots and engage theunder side of the internal flange of said lining, and a rubber plugseeured to the bottom of said bung fitting the bowl-shaped interior ofsaid lining.

In testimony whereof I afliX my signature in presence of two Witnesses.

FINLEY R. BUTTERFIELD. \Vitnesses:

J. B. THURSTON, THOMAS SAVAGE.

